Castlevania: The Dracula X Chronicles review at 1up.

"You see, I fell in love with Symphony of the Night when I first played it; when I discovered that it was a direct sequel to Rondo of Blood, a rare PC Engine Duo game that never left Japan, I became determined to track down and play the original. Unfortunately, the cost of the game and the hardware it ran on hovered somewhere around "astronomical." But as the years went by, I eventually accepted that Rondo would never make its way to the U.S. Finally, sometime last year, I grudgingly forked over the cash necessary to experience the game in all its glory at long last."

Full Source: 1up